SSD Solid State Drive
A hard disk made of a solid-state electronic memory chip array is composed of a control unit and a storage unit (FLASH chip, DRAM chip). It has the characteristics of fast reading and writing, light weight, low energy consumption and small size that traditional mechanical hard disks do not have.
Mechanical hard drive
Mechanical hard disks are traditional ordinary hard disks, which are composed of disks, magnetic heads, disk spindles, and control motors, head controllers, data converters, interfaces, and caches.
SSHD hybrid hard drive
A hybrid hard disk is a new hard disk based on a traditional mechanical hard disk. In addition to the required disks, motors, magnetic heads, etc. of the mechanical hard disk, it also has a built-in NAND flash memory particle. This particle stores data that users frequently access, which can Read performance of SSD solid state hard drive effect.
It is a computer bus whose main function is to transfer data between the motherboard and a large number of storage devices such as hard disks and optical disk drives. The SATA bus uses an embedded clock signal, which has the advantages of simple structure and hot plugging.
It is a new generation of bus interface. At present, the popular point-to-point serial connection in the industry. Compared with the shared parallel architecture of PCI and earlier computer buses, each device has its own dedicated connection. The data transmission rate is increased to a very high frequency.
Hard drive capacity
Hard disk capacity determines the amount of data storage capacity of a personal computer. The current mainstream mechanical hard drive capacity is between 500GB and 2TB. Factors affecting hard disk capacity include single disk capacity and number of disks.
The new generation USB interface is characterized by a very fast transmission rate, which can theoretically reach 5Gbps, which is 10 times faster than USB 2.0. The appearance is basically the same as the ordinary USB interface, and it is compatible with USB 2.0 devices.
Hard disk speed
The rotation speed of the motor spindle in the mechanical hard disk, that is, the maximum number of revolutions that the hard disk can complete in one minute. One of the key factors that determines the read and write speed of the hard disk. Notebook desktop hard drive speeds are 5400rpm and 7200rpm. The server hard disk speed is 10,000 rpm or even 15,000 rpm.
Hard disk cache provides high-speed data buffering for the reading and writing of mechanical hard disks. The larger cache capacity can greatly improve the burst read and write speed of mechanical hard disks, especially when the mechanical hard disks need to frequently modify data, it can maximize its performance and greatly increase the life of mechanical hard disks.
MSATA allows SATA technology to be integrated into small form factor devices. At the same time, MSATA will provide the same speed and reliability as the SATA interface standard. Due to the small size of the MSATA interface, more and more notebooks are beginning to use hard drives with this interface.
SAS interface technology is backward compatible with SATA. SATA hard disks can be used directly in the SAS environment, but SAS cannot be used directly in the SATA environment. Both SAS interface desktop and server can be used, but SATA is generally used for desktop.